1. comment on same-niche blogs (or blogs on topics you like and might be related to yours). 2. post in forums (again similar niche as much as possible) Do this consistently and provide QUALITY replies, don't spam. These were always my top 2 ways to get quality targeted traffic to my web sites. 3. be active on social media sites (Twitter, Facebook etc.) .. these would be just 3 solutions, there are many more (build premium designs and sell them - with your link on them, write good e-books and sell/provide for free, promote offline etc.)
No, your adsense account will not suffer but your earnings will. Drive organic traffic via seo. Learn basics and impediment on your blogs.